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JFinal is a simple, light, rapid,independent, extensible Java WEB + ORM framework. The feature of JFinal looks like ruby on rails especially ActiveRecord.

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/**
 * Copyright (c) 2011-2017, 玛雅牛 (myaniu AT gmail.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.jfinal.core.paragetter;

import com.jfinal.core.Action;
import com.jfinal.core.ActionException;
import com.jfinal.core.Controller;
import com.jfinal.kit.StrKit;
import com.jfinal.render.RenderManager;

public class ShortGetter extends ParaGetter {
	
	public ShortGetter(String parameterName, String defaultValue) {
		super(parameterName,defaultValue);
	}

	@Override
	public Short get(Action action, Controller c) {
		String value = c.getPara(this.getParameterName());
		try {
			if (StrKit.isBlank(value))
				return this.getDefaultValue();
			return to(value.trim());
		}
		catch (Exception e) {
			throw new ActionException(400, RenderManager.me().getRenderFactory().getErrorRender(400),  "Can not parse the parameter \"" + value + "\" to Short value.");
		}
	}

	@Override
	protected Short to(String v) {
		if(StrKit.notBlank(v)){
			return Short.parseShort(v);
		}
		return null;
	}

}